Supercritical CO2 Waste Heat Recovery for Marine Gas Turbines

高昂的燃油价格和更严格的排放法规(特别是海事组织第三级排放法规)共同导致整个海洋部门对废热回收技术的兴趣与日俱增。与往复式燃气轮机相比，燃气轮机向大气中拒绝了大量的热量。使用以超临界二氧化碳为工质的筑底循环回收这些热量，有可能实现接近55%的联合循环效率--在简单循环中效率的阶跃变化，以及在部分负荷时克服效率低下的机会。电力预计将是热回收系统最理想的输出，尽管机械动力也是可能的。与替代的废热回收技术相比，在紧凑性方面具有显著的优势。

The combination of high fuel prices and more stringent emissions legislation (particularly IMO Tier III) has led to an increasing interest in waste heat recovery technologies across the marine sector. Gas turbines reject a large quantity of heat to the atmosphere compared with their reciprocating counterparts. Recovery of this heat using a bottoming cycle with supercritical CO2 as the working fluid has the potential to achieve a combined cycle efficiency approaching 55% - a step-change in efficiency over a simple cycle and an opportunity to overcome poor efficiency at part-load. Electrical power is expected to be the most desirable output of the heat recovery system, although mechanical power is also possible. Significant advantages in compactness are achievable over alternative waste heat recovery technologies.